If your head hasn't been lost up in the cirrus or cumulus, you've probably heard of cloud computing over the last few years.
"The cloud" has figured prominently in President Obama's technology initiatives, in the business plans of familiar tech giants such as Google, Amazon and Microsoft, and even in a New Yorker cartoon last month -- depicting a parachutist struggling to use a laptop.
It's also been the occasional butt of skeptics, such as Oracle co-founder Larry Ellison.
"It's databases and operating systems and memory and microprocessors and the Internet. And all of a sudden, it's none of that -- it's 'the cloud,'" Ellison said -- in a speech you can still pull down from the YouTube section of the cloud.
Oracle now offers "Premier Cloud Services," but Ellison had a point. For a decade, Oracle had rented its enterprise-resource-management system to corporate customers who didn't want to invest in their own hardware, software and IT personnel -- a key advantage of using the cloud. So had other firms that pioneered "software as a service," one of the buzz phrases of the cloud era.
Not a ploy
Still, that doesn't mean cloud computing is a nebulous idea or marketing ploy. Advocates such as Patrick Harr, Hewlett-Packard's vice president of global cloud strategy, argue that recent technological and business developments make "the cloud" a truly different way of using computer resources.
"The cloud is the great equalizer," Harr said in an interview. It offers companies and consumers access to user-friendly services that might otherwise require large expenses for software, hardware and training. And that access can often be available from anywhere on the Internet.